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Rotary Engine Con Rod Crank Pin Assy

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dsquire:

--- Quote from: sbwhart on December 06, 2009, 04:30:33 AM ---
--- Quote from: John Hill on December 06, 2009, 03:38:12 AM ---
Your cranked rods will become a challenge when you go on to your 9 cylinder version! :lol:

--- End quote ---

Thanks John

I was thinking of a 16 cylinder Job  Like this. http://www.enginehistory.org/bristol_hydra.htm

I've watched this engine grow at model expos over the last few years.

this engine is a labour of love

Enjoy

Stew

--- End quote ---

I just had a look at this site and wow. Pay particular attention to the layout of the connecting rod. 5 cylinders on 1/2 of center and 3 cylinders on the other 1/2. I have attached a link to the drawing so you can see what I mean.

http://www.enginehistory.org/ModelEngines/Perkins/Hydra/HydraDwgs/HydraRods.jpg     Connecting rods for16 cylinder radial

Cheers  :beer:

Don

sbwhart:
Hi Don thanks for the drawing link its mindbogling.

Every time I look at the site I see something new look at this for a double Rotary Table set up.

http://www.enginehistory.org/ModelEngines/Perkins/Hydra/DiffuserVanes_1.jpg

Cheers

Stew

tinkerer:

[/quote]

I just had a look at this site and wow. Pay particular attention to the layout of the connecting rod. 5 cylinders on 1/2 of center and 3 cylinders on the other 1/2. I have attached a link to the drawing so you can see what I mean.

http://www.enginehistory.org/ModelEngines/Perkins/Hydra/HydraDwgs/HydraRods.jpg     Connecting rods for16 cylinder radial

Cheers  :beer:

Don
[/quote]
I am not seeing this. I see 8 cylinders evenly spaced at 34.8 deg all on the same plane.

dsquire:

--- Quote from: tinkerer on December 06, 2009, 02:29:24 PM ---

--- End quote ---

I just had a look at this site and wow. Pay particular attention to the layout of the connecting rod. 5 cylinders on 1/2 of center and 3 cylinders on the other 1/2. I have attached a link to the drawing so you can see what I mean.

http://www.enginehistory.org/ModelEngines/Perkins/Hydra/HydraDwgs/HydraRods.jpg     Connecting rods for16 cylinder radial

Cheers  :beer:

Don
[/quote]
I am not seeing this. I see 8 cylinders evenly spaced at 34.8 deg all on the same plane.
[/quote]

Tinkerer

Look at the spacings of the connection points on the main connecting rod. This is for 8 cylinders so there are 2 of them for 16 cylinders. The 34.8 deg dimension is to a center line not the next cylinder. 5 of the secondary connecting rods are on the right side of this center line and 2 on the left of the center line. The 8th cylinder is the main connecting rod.

Hope this makes sense Tinkerer

Cheers  :beer:

Don

tinkerer:
Aha, I see the 34.8 deg is to the center of the slot. It depends on which center line you look at. If you look at the line from wrist pin to crank, they are equally divided, but at perpendicular center line they are divided 5 & 3. I think the other 8 cylinders would be just another bank of 8 but I could be wrong about that too.

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